Special box-plait attachment



Nov. 16, 1926.

- B. M. KRELL ET AL SPECIAL BOX PLAIT ATTACHMENT Filed April 9 1925 M .wM u a for-min Patented Nov. 16, 19 26.

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BERNARD MfKRELL, orfnnw some, nn MEYER enonrann MICHAEL ZUGKER-, i MAN,or BROOKLYN. new YORK.

. 'srEorAx. BOX-PLAI'I ATTACHMENT Application filed April 9,

This invention relates to improvementsin attachments for sewing thefront seams. in

mens shirts. and also relates to a new con- -l 'itruction of the frontseam itself.-

. T he object of the invention is to provide anew form of front seam formens, shirt whereby less bulky front seam is obtained and vwhichresultsin very substantial savings of material. p

Another object of theinvention is to pro- 'vide a practicalattachment'for making the iniprovedshirt front seam, said attachmentbeing an apted to be attached to a sewing ma-. chine. i I

. lVitli these objects in view the invention is embodied in a new shirtfront seam and attachmenttherefor arranged and constructed ashereinafter set forth and as illustrated in the accompanying drawing inwhich Figure 1 is a view in cross section of ashirt frontSeaineinbodying the invention.

Figure 2 is a'plan View of the attachment awav.

Figure 3 is a side view of'the attachment. l igure 1 is a longitiiidinalsectional view the attachment. Figure 5 is a transverse sectional viewtaken on line 55 of Figure 4.

l' igure 6 is an end view of the attachment looking in the direction ofarrow 6 in Fig iii-e3. Figure? is a bottom detail view 'of the lowerforming members. Figure 8 is a bottom detail view of the upper formingmember.

The shirt front seam to which this invention relates is that part of amans shirt in which the button holes are made. Both for this reasonandfor the sake of appearance, the front seam is made ofsuitable widthand. of a 'louble thickness of materialreiir' forced by a strip oflining. The, shirt front seam is usually one and one quarter incheswide. If a double thickness of material is used, it takes twice as muchin addition to the folds for properly forming theseains.

Heretofore ithas been. the custom to fornr the shirt front by sewing astrip of shirt material in front of the edge portion of the left part ofthe shirt in front. This invention provides a construction in which theseam portion is formed in front, and a separate strip is sewn on theback with a suitable lining interposed. In this again parallel toitselfat 15.

g the seam, parts being broken 1925. Serial 1%)21370.

manner material. is saved to the extent of the width of the front seamandthe necessary folded portions and the back stripmay be madeof cheapergrade of strip material so that it is not necessary to out shirt .n1a-

terial into strips which is both expensive and wasteful...

' Referring now tothe drawing Figure 1 illustrates in cross section thefront seam or front portion of the left side of a inans shirt. 1'11thedranvi'ngv the'numeral 10 denotes the front or'outside and 11 is theback or inside which lies against the body. The

' numeral 12 denotes the left front shirt portion which covers the left.side of thebocly and extendsto the edge 18. V

I Said shirt body portion 12 is adjacent the edge bent back upon itselfat 1 1, thence bent I p The material then for'msthe button hole portion16 and at the edge 13 'theniaterial'is again bent upon itself.

Thus at 1%15 there is formed a double fold with three thicknesses ofmaterial and at 1.3,there is formed a single fold with .two thicknessesof material. 7 r

A lining 7 is laid within the foldsagainst the portion 16. Back of thelatterisplaced an inside or back stripv 18 being folded at both edges 19and 20 'and the parts are sewn together by the two seams 21, 21. l I

The result is a shirt front seam havingthesam'e appearance as those nowin use. But only one thickness of shirt fabric is used thus resulting ina material saving.

The attachment provided. for auto'matically folding the materials asaforesaid coniprises a lowerv folding member 22and an upper foldingmember 23; The lower fold ingL-member is preferably formed offtw omembers 2 1 and 25, which are soldered or otherwise joined to form aider bottom channel 26 and narrow side channels 27, 27. The lowerfolding member has a wide. entrance or mouth '28 and :is tapered forwardto a'flat spout 29 The sidech'a'nnels are tapered from" the entrancetowards the mouth, being firstrounded as at 30 in Fig ure' 5 andthentapering into narrow fiat channels asat 31 in Figure 6. p Thebottom'channelQG extendsto both sides under the side channels 27 andtapers also horizontally as seen in Figure 4.

It will be understood that when astrip. of material as the aforesaidback strip 18 is introduced or fed into the lower folding 'nel der thetop ll.

"and double folded in the material is member through the entrance 28 itwill be shaped gradually from the shape shown in a heavy black line inFigure to pass out from the spout 29 with the folds 19 and foldedsharply flat against the portion 18 as in Figure 1. r

The upper channel member 2 1- in the lower forming member 22 preferablyextends beyond the spent 29 as shown to form a sharp guide tongue 32.

The upper folding member 23 has cha "el a lower lining channel i l andan brie channel 35. The lining chan- 1S relatively long and tapered fromthe entrance 36 to the flat spout at 3 7.

The fabric channel is relatively short and has a f'laring mouth orentrance 38.

, The lining channel is formed between the bottom 59 and middle member4:0. The ric channel is formed between the member l0 and top l1. Thelatter has a window The middle member lO extends beyond the spout at3''! to form a flaring guide tongue is. r V 7 As shown in Figure 5, tothe one side the top l1 is wrapped around the middle memher and joinedto the bottom to form a side channel le.- which extends in under thelining channel 34. The other side of the top is also wrapped or bentaround the top as at 45 but is not joined to the bottom 39. i

To the bottom 39 is joined a shelf Q6, and the edge ofthe shelf and theedge of the top at l5 overlap forming a'double side channel 4-7. Thus itwill be seen that when the shirt 'material is introduced in the upperforming member as indicated by a heavy black line in Figure 5,'thematerial will be formed with the edge fold at 13 in side channel l l,then lie on top of the middle member andun- And onthe other side thematerial will be foldedwithin the portion double channel 17 and the restof the fabric will lie on the shelf 46. The lining which is a fiatunfolded strip will be fed forward in' the channel 3%. The lining isnotshown in Figure 5.

The window 42 is for the purpose of observing the fabric during itspassage through the attachment, but it rmay be omitted as in Figure 6.

The three'elements in the shirt front seam are fed forward intotheattachment at the same time; The back strip 18 is fed in through themouth 28, the lining is fed in through the mouth 36 and the front shirtfed 1n through the mouth 38. As seen in the drawing, the folding mem-.ments emerge at the spouts in proper 'tlOD to each other, the hm'ngbers are in vertical superposed relation and converge in angularrelation, the spouts 29 and 37 almost touching.

relabemg contained within the folds 13 and 15 and all the folds beingvery flat and sharp.

In this condition and position they are fed in under the sewingmechanism of a sewing machine indicated by the needles 5() in Figure 2,and as usual in this art, the sewing machine mechanism which includes afeed, draws the elementstherethrough and they are sewed together.

For purposes of support and adjustment the lower folding member has astem 51 adjustably secured '53. The upper folding member has a bracket5% adjustably secured by screws 55 to a stem'56, which in turn isadjustably secured to the base 52 by screws 57. Thus lateral adjustmentin two directions is as-.

sured. The base issuitably secured to the sewing machine table on top,not shown.

7 The several parts of the attachment are suitably joined by soldering,preferably, and accomplish the object of the invention in automaticallyfolding the fabric to form the improved shirt front seam.

We claim An attachment of the character described comprising a lowerfolding element and an upper folding element, said lower folding elementbeing adapted to fold the edges of a strip of fabric upon itself andcomprising an upper member and alower member joined to form a centralflat channel and two rounded edge channels thereabove, the upper foldingelement being adapted to fold one edge of another piece of fabric backupon itself and for double folding an interme diate portion of saidother piece of fabric as and for the purpose described, said upperfolding. element being bent to form a flat fabric channel merging intolower side channels at the edges thereof, a double folding channelformed in continuation of and below one of the said lower side channels,a member extending between said lower side channels to form a space fora piece of lining material'below the flat fabric channel, all of thechannels formed in the upper folding element being in substantialparallel relation, and means for supporting the said two foldingelements with their AXGSCO11- verging and in the same vertical plane.

BERNARD NLKRELL. MEYER'BRODY. MICHAEL ZUCKERMAN.

The three said ole-- to a base 52 by screws ill) llU

